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Be Quiet - Straight Power E9 680W PSU Unboxing and Overview

If you're looking for high quality, reliability, high efficiency and near silent operation you don't have to look much further than Be Quiet. The Straight Power E9 is a product that offers all of the above.

As I’ve now come to expect with Be Quiet products the Straight Power E9 delivers on all aspects of Be Quiets attention to detail and determination to build a product which is the best in class.

Although not in their High-End range of products the Straight Power is still a high quality PSU boasting the following features:

World Class Quiet and Efficiency

The Straight PowerTM E9 680W CM provides best-in-class performance for systems that demand whisper-quiet operation without the slightest compromise in power quality. The many premium features our German team has designed into this power supply make the E9 680W CM a ‘Best Choice’ for new systems and as a replacement in existing systems.

• Virtually silent operation achieved through a broad array of meticulous optimizations, including use of custom-designed 135mm SilentWings® Fan
• SilentWings fan features airflow-optimized fan blade, fluid dynamic bearing with copper core and high quality IC motor controller
• 680 Watts of continuous power provide extensive power reserves for those times your PC really needs it all
• Cable management with extra-long cable reach simplifies component installation and reduces annoying clutter, increasing airflow and improving cooling in even the largest PC cases
• 80PLUS Gold certification and up to 93% power conversion efficiency let you do more work with the same power and reduce your power bills
• NVIDIA Hybrid readiness and AMD CrossfireX certification allows you to build powerful Multi-GPU systems with confidence
• German product conception, design and quality control
• Advanced gaming up to Triple-GPU
• Silent PC builds
• Multimedia systems and Home Theatre
• Photo and Video editing desktops

Virtually Silent Operation

• Installed 135mm SilentWings fan includes a wide array of electronic and mechanical optimizations for best-of-class airflow with very low noise production, including:
•  unique airflow-optimized fan blade design reduces noise-generating fan turbulence
• advanced fluid dynamic bearing with copper core provides for greatly reduced operating noise and super-long life
• high quality IC motor controller reduces electrical noise
• SilentWings fan is decoupled from the PSU body with special mounts, reducing transmission of vibration and noise
• Optimized PSU airflow design generates superior cooling at lower fan speeds and reduces turbulence around components, thus allowing even quieter operation
• Variable fan speed is optimally governed to strike the best balance between proper cooling and deep quiet


• All-new integrated circuit power conversion design features Active Clamp and Synchronous Rectifier (SR) technology for amazing signal stability and power efficiency
• Premium quality capacitors rated to 105°C for maximum reliability and operating life
• Full suite of top safety protections defends against over-currents, over- and under-voltages, short circuits, overheating and overloads, thus safeguarding your valuable components
• Four independent +12V rails improve power signal stability

Energy Efficiency

• 80PLUS GOLD certification independently verifies the extremely high operating efficiency (up to 93%) of this design
• High efficiency means money savings, because your PC draws less power from the mains to do its work
• High efficiency also means less waste heat, less cooling required, and overall quieter operation
• Standby drain of less than 0.3 Watts
• Meets Energy Star 5.0 guidelines
• Fulfils ErP 2013 guidelines
• Zero Load design supports Intel’s Deep Power Down C6 mode

Maximum Compatibility and Convenience

• Modular, sleeved cable management system with removable cable bundles simplifies component installation, reduces annoying clutter, increases airflow and allows for improved cooling
• System features 23 connectors for large system builds
• Connectors are compatible with older components as well as those still on the drawing board
• Cable lengths up to 115 cm are perfect for large PC cases
• Individual P4 and P8 plugs support all common mainboard types
• Four PCIe connectors for powerful multi-GPU configurations (NVIDIA SLI Ready, NVIDIA Hybrid and AMD CrossFireX) up to Triple GPUs.
• Clearly labelled plugs and clever accessories promote simple installation

Outstanding Service and Support

  • 5 year manufacturer's warranty

In the video below I'll show you around the product and give you an idea of whats included: